# QFT from CFT

Date and time |
Nov 29, 2019 from 02:00 PM to 03:00 PM |
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Location | 60 St. George Street, MP 1115 |

Host | Erich Poppitz |

## Emanuel Katz

**
Boston University
**

I will describe a new numerical approach for calculating dynamical quantities in QFT in the non-perturbative regime. In this approach any QFT (including a gauge theory) can be formulated as a relevant perturbation of a UV CFT.

The states of the CFT are used as a basis to describe the resulting RG-flow. Holography motivates a certain truncation of the CFT basis which allows for numerical calculation of the eigenstates of the QFT Hamiltonian. I will provide numerical evidence in certain 2D and 3D theories that this truncation provides for an effective approximation for evaluating non-perturbative quantities (like the Zamolodchikov c-function along an RG-flow). Implementing the method in the context of light-cone quantization has various advantages including greatly simplifying flows and allowing one to evaluate observables in infinite volume. Light-cone quantization has its own subtleties associated with phase transitions. However, for certain SUSY examples, those subtleties can be avoided.

Contact Name | Helen Iyer |
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